若一定质量的理想气体分别按下图所示的三种不同过程变化，其中表示等压变化的是___

发布时间：2017-07-22 23:36 │ 来源：www.tikuol.com

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问题：

若一定质量的理想气体分别按下图所示的三种不同过程变化，其中表示等压变化的是_____________（填“A”、“B”或“C”），该过程中气体的内能_____________（填“增加”、“减少”或“不变”）。

考点：理想气体状态方程

题型：填空题

阅读下面语言材料，完成表格中相关内容。

Ladies and gentlemen,
     Welcome to England! The weather of England is very changeable (易变的). It can be rainy, sunny,
cloudy, windy, stormy, warm, foggy, or cold at any time of the year. If it is raining when you get up in the
morning, it can be hot and dry by the afternoon. It may be sunny when you get up, but when you go out, it
may be rainy. So don't forget to take an umbrella with you. The west of England is wetter than the east, and
the north is cooler than the south. You should be ready for any kind of weather.
    In England, shops are usually open from 9.00 a.m. to 5.30 p.m. On Sundays, some shops are open from
10.00 a.m. to 4.00 p.m. But a lot of shops are closed. Banks, museums or other places are open from 10.00
a.m. to 5.00 p.m. You can go to the parks at any time.
    All the cities have buses, trains and taxis. People wait in line for buses and they are unhappy if you push in
at the front. Don't forget that traffic goes on the left.
    Be careful with yourselves when you travel in England!

Notice (须知) to the visitors
·At any time of the year, the weather in England is changeable.
·Just be 1.__________ for any kind of weather.
·You should 2.__________ to take an umbrella when you go out.
·The north of England is 3.__________ than the south.
·Shops are usually open at 4.__________.
On Sundays, some shops are open for 5.__________ hours but many shops are 6.
·At any time you can go to the 7.__________.
·Don't 8.__________ in at the front when you are at the bus stop.
·Make sure not to walk on the 9.__________ of the road, or it will be very dangerous.
If you travel in England, you should do everything 10.__________.

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装配图上一般要标注（）尺寸。

A.5类；

B.4类；

C.3类；

D.2类。

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《建设项目环境影响评价资质管理办法》规定：环境影响评价资质证书在全国范围内使用，有效期为（）年。

A.6

B.5

C.3

D.4

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下列说法正确的是( )。 ①合同部分无效，不影响其他部分的效力，其他部分仍然有效； ②合同无效意味着合同中所有条款都无效； ③无效合同自裁定无效之日起无效； ④无效合同自订立之日起无效； ⑤无效的合同自始无效

A．①④⑤

B．②③④

C．③④⑤

D．①②③

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为了提高测试的效率，应该

A．随机选取测试数据

B．取一切可能的输入数据作为测试数据

C．在完成编码以后制定软件的测试计划

D．集中对付那些错误群集的程序

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